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Question : The SI unit of power of the lens is ________.

Option 1: candela

Option 2: mole

Option 3: watt

Option 4: dioptre


Team Careers360 1st Jan, 2024
Answer (1)
Team Careers360 18th Jan, 2024

Correct Answer: dioptre


Solution : The correct option is dioptre.

The SI unit of power of a lens is the dioptre (D). It quantifies the ability of a lens to converge or diverge light. Positive dioptre values indicate converging lenses, while negative values denote diverging lenses. One dioptre equals one focal length metre; higher values indicate a stronger prescription.

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